/* Filename: hello.c
 * Description: <TODO>
 * $ gcc -Wall -fopenmp hello.c -o hello
 * Last modified: humble 20200418 22:16
 */
#include <stdio.h>
#include <stdlib.h>

static void usage(void);

int main(int argc, char **argv)
{
    if(argc != 1){
        fprintf(stderr, "argc !=1");
        usage();
        exit(1);
    }

#pragma omp parallel //openmp 语法标记
    {
        puts("Hello");
        puts("World");
    }
    return 0;
}

static void usage(void)
{
#define USAGE "Usage:\n\
  Helloworld\n"
    printf(USAGE);
}
